5. Factor out the unit-norm basis (and operator symmetry) tests once
all of the algebras pass.
-6. Refactor the current ungodly fast charpoly hack (relies on the
- theory to ensure that the charpolys are equal.)
+6. Add a TrivialEJA class and use it in the tests for is_trivial().
+ The random_eja() function should also be able to return these.